Finding the Fourth Proportional to 10,665.78, 14,717.61 and 7,516.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.78 : 14,717.61 = 7,516.50 : x
2. Step 2: Convert to fraction form
   10,665.78/14,717.61 = 7,516.50/x
3. Step 3: Cross multiply
   10,665.78x = 14,717.61 × 7,516.50
4. Step 4: Simplify right side
   10,665.78x = 110,624,915.57
5. Step 5: Solve for x
   x = 110,624,915.57/10,665.78
6. Step 6: Final answer
   x = 10,371.95